Pneumatic painting apparatus with spray gun, heater device, and dehumidifier/drier device provided with a regenerating device for the adsorptive agent for fluidifying the paint

Abstract

Pneumatic painting apparatus of the present invention includes a compressor, a de-humidifier device, a heater for compressed air, a regenerating device for an adsorptive agent, a spray gun with a temperature sensor, a delivery pipe, and a control unit. The control unit opens upstream from the de-humidifier device. The circuit, along which the flow of air from the container of compressed air travels, includes passing through at least the heater and going along the delivery pipe of the compressed air flow towards a spray gun or vice-versa, not supplying the spray gun. The upstream circuit of the de-humidifier device closes, activating the regenerating device for the adsorptive agent of the de-humidifier device. The circuit takes a regenerating path inverse to the previous one, the circuit, from the compressed air container first crossing the heater device and later the de-humidifier device.

Description

CROSS-REFERENCE TO RELATED U.S. APPLICATIONS[0001]Not applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT[0003]Not applicable.REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC[0004]Not applicable.BACKGROUND OF THE INVENTION[0005]1. Field of the Invention[0006]The object of this invention is a painting apparatus of the pneumatic type which provides for the use of at least one spray gun with an integrated heater device, de-humidifier / drier device and regenerating device for the de-humidifier / drier device's adsorptive agent for fluidifying the paint.[0007]2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98[0008]Spray guns are known. Together with a compressor group, they are part of the equipment for carrying out the pneumatic-spray painting of surfaces, for example of motor vehicle bodywork.[0009]In principle, the equipment, for painting decorative or ...

AI Technical Summary

Benefits of technology

[0064]By the considerable creative contribution of the present invention constitutes an immediate and not negligible technical advancement. Different and important objectives are achieved.

[0065]A first aim is obtaining an apparatus for the pneumatic painting with spray gun, being particularly efficient and able to maintain a optimal condition of fluidity of the paint during the application to the support, independent from environmental temperature. In particular, intermediate adjustments are allowed, including adjustments between a position of maximum and minimum working temperature.

[0066]A second aim is to allow for the optimal de-humidifying of the compressed airflow and regenerating the adsorptive agent. The de-humidifying content is located inside the de-humidifier device/drier, when the pistol spray gun is not in an operative condition.

[0067]A third aim is to obtain the de-humidifying of the adsorptive agent by making the agent pass across a de-humidifier device/drier, made up of a pipe filled with silica gel. Such gel is “regenerated periodically” because adsorbing humidity decreases its de

Problems solved by technology

Part of the compressed air produced by the compressor is therefore wasted for such regenerating and is no longer utilized during the painting process, reducing the quantity of effective air for the painting.

Such substances do not alter the dehumidifying performance of the silica gel, but are instead highly harmful for the utilized membranes in the EP 1332784 (Milli) device, making the devices

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